DualCheck non-contact voltage tester and GCFI outlet tester. GFCI outlet tester on one end and a 50-1000V AC non-contact voltage tester on the other. Features a bright 360 degree LED visual indicator along with an audible beeping indicator of the presence of voltage. Single LED readout indicating correct wiring or bad ground, open neutral, hot/ground reverse, hot/neutral reverse, and open hot wiring errors. 250 pound crush rating and the ability to withstand drops of up to 10 feet. 7" height x 1.38" width x 1.2" length/depth.